Publication: A multiplet table for neutral helium (He-4) with transition rates.

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Title	A multiplet table for neutral helium (He-4) with transition rates.
Authors/Editors*	G. W. F. Drake, D.C. Morton
Where published*	Astrophys. J. Suppl. Series
How published*	Journal
Year*	2007
Volume	170
Number
Pages	251-260
Publisher
Keywords
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Abstract	This paper combines the precise determination of the energy levels of He-4 I from calculations and experiments with theoretical transition probabilities to present multiplet tables and finding lists for the fine structure of the helium atom. The tabulated transition rates and oscillator strengths include corrections for singlet Y triplet mixing and spin-orbit coupling, but not the higher order relativistic terms nor the finite nuclear mass, although the latter are tabulated for future use. The results are consistent with laboratory lifetimes and oscillator strengths, but very few measurements are accurate enough to be stringent tests. An Appendix discusses the corrections for finite nuclear mass.